[TowerTalk] Dumb question

[Gary Johnson]

I have an accurate model of a JK801. At 145 ft, and at peak gain takeoff angle of 25 deg, F/S = 9.8 dB. Gets better at lower angles, worse at higher.

EZNEC model sent to Jim in PM.

-Gary NA6O

> On Apr 13, 2026, at 9:00 AM, towertalk-request at contesting.com wrote:
> 
> Date: Mon, 13 Apr 2026 07:20:25 -0700
> From: "jim.thom jim.thom at telus.net <mailto:jim.thom at telus.net>" <jim.thom at telus.net <mailto:jim.thom at telus.net>>
> To: towertalk at contesting.com <mailto:towertalk at contesting.com>
> Subject: [TowerTalk] Dumb question
> 
> 
> When a 1/2 sized loaded  75m rotary dipole (combo of  Capacity hats  part
> way out either side  +  a seco systems  compressible coils at the
> feedpoint)..... what is the FS ratio... when modeled  in free space ??   (
> 68' log ele...tip to tip)
> 
> This is more academic than anything.   Right now,  I have no way to model
> that config.
> 
> Jim   VE7RF